628868887 has 2 divisors, whose sum is σ = 628868888. Its totient is φ = 628868886.

The previous prime is 628868881. The next prime is 628868893. The reversal of 628868887 is 788868826.

It is a balanced prime because it is at equal distance from previous prime (628868881) and next prime (628868893).

It is a cyclic number.

It is not a de Polignac number, because 628868887 - 2¹⁵ = 628836119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628868881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314434443 + 314434444.

It is an arithmetic number, because the mean of its divisors is an integer number (314434444).

Almost surely, 2^628868887 is an apocalyptic number.

628868887 is a deficient number, since it is larger than the sum of its proper divisors (1).

628868887 is an equidigital number, since it uses as much as digits as its factorization.

628868887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16515072, while the sum is 61.

The square root of 628868887 is about 25077.2583629072. The cubic root of 628868887 is about 856.7485332257.

Subtracting from 628868887 its sum of digits (61), we obtain a palindrome (628868826).

The spelling of 628868887 in words is "six hundred twenty-eight million, eight hundred sixty-eight thousand, eight hundred eighty-seven".